Preheat oven to 350 degrees.
In a large bowl add eggs, milk, salt and pepper and whisk together completely. Set aside.
Cook the sausage. Once the sausage is cooked (do not drain grease), add sausage, pepper & onion blend, finely chopped jalapeno, chopped mushrooms, spinach, and butter and cook together on low for about 5 minutes. Season to your liking.
Combine, eggs, sausage mixture, 1 cup cheese and mix.
Pour mixture into greased baking pan and bake for about 20 minutes or until done.
Add an additional 1 cup of cheese (or more if you like) to the top of the breakfast bake and cook for another 3-5 minutes or until the cheese is melted.
Garnish with green onion and enjoy.